public class test_11_18 {
    public static void main(String[] args) {
        int a=10;
        System.out.println(a);

        long b=20L;
        System.out.println(b);

        double c=30.3;
        float d=41.1F;
        System.out.println(c);
        System.out.println(d);

        char ch1='a';
        char ch2='哈';
        System.out.println(ch1);
        System.out.println(ch2);

        String s1="hhh";
        String s2=123+"";
        System.out.println(s1);
        System.out.println(s2);

        System.out.println("a=="+a);
    }
}
